Portable elevator.



W. E. BOEHCK 8!. H. S. GERMONDJR.

PORTABLE ELEVATOR.

APPLICATION FILEDJUNEZS. 19l8.

Patented Oct. 29, 1918.

2 5HEETSSHEET I.

ATTORNEY W. E. BOEHCK & H. S. GERMOND,JR. PORTABLE ELEVATOR.

APPLICATION FILED JUNE 25. ms.

11. .28Q336. Patented 0%.29, 1918.

2 SHEETSSHEET 2.

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ATTORNEY WTTED ETTEE PATENT FFQE.

WILLIAM'E. BOEHCK, OF JERSEY CITY, AND HENRY S. GEBMOND, JR., OF BAYONNE, NEW JERSEY, ASSIGNC-RS TO REVOLVATOB COMPANY, OF JERSEY GITY, NEW

JERSEY, A CORPORATION OF NEW JERSEY. V

PORTABLE ELEVATOR.

Specification of Letters Patent.

Patented Uct. 29, 1918..

Application filed June 25, 1918. Serial No. 241,816.

of New Jersey, have invented certain new and useful Improvements in Portable Elevators, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in portable elevators or tiering machines and particularly to improvements in mechanism by means of which the support of the eleva tor-base may be readily changed from a rolling support upon wheels to a stationary support upon posts or legs, and vice versa. An object of this invention is to provide a mechanism of the character just referred to which will be simple in construction, comparatively cheap in manufacture and efiicient in operation and use.

In the drawings illustrating the principle of this invention and the best mode now known to us of applying that principle, Figure 1 is a side elevation of so much of a portable elevator as is necessary to illustrate this invention and shows the elevatorbase as being supported upon wheels; Fig. 2 is a similar view but illustrates the elevatorbase as being supported upon legs; Fig. 3 is a front elevation, looking in the direction of the arrow A in Fig. 1; and Fig. 4 is a rear elevation, looking in the direction of the arrow B in Fig. 1, one of the wheels being shown in section. For clearness, the platform is omitted in Figs. 3 and 4E.

The base-members a support the uprights or standards (9 which are held firmly braced. by the inclined bars 0 and within. which travels up and down the load-carrying plat-.

form d controlled by thehoisting cable 6. Each of the base-members a is provided, at its front end, with a supporting post or leg f and, at its rear end, with a supporting post or leg g; and the elevator is shown, in Fig. 2, supported upon these posts f, g. The base-members a furthermore carry a stationary rear-axle h (Fig. 4) on each end it of which there is rotatably mountedan eccentrioi provided with a radially-extending crank-arm 7'. Upon each eccentric a there is mounted rotatably a wheel m. The steering-wheel n (Fig. 3) is rotatably mounted in ahanger or bracket 0 the top of which is fastened to one wall 39 of an L-shaped or angle-iron transverse-member or crosspiece p which, as is more particularly described hereinafter, may be rocked or oscillated and which is called by us a dropbridge. The tongue 9 is pivotally mounted, at its inner end, in the hanger 0.

In transverse section, the drop-bridge 29 is in the form or shape of an inverted L and, to each end of that side 79 which, in the position of the drop-bridge illustrated in Figs. 1, 3 and t, forms the top or is uppermost, there is fastened rigidly one side of an angle-iron or bracket 79 forming an endpiece of the drop-bridge p. Projecting inwardly from the base-members a are a pair of oppositely-disposed pivot-pins 7' which extend into holes 1" formed in the lower ends (Fig. 3) of the end-pieces p and upon which the drop-bridge 79 may be swung or rocked. The front end of each of the base-members a is cut away at the top thereof or formed with a notch or recess a. Just above the hole r, each end-piece 79" is provided with a stud s tapped thereinto, which stud projects outwardly into the notch or recess a- This stud s carries pivotally fastened thereon the front end of a link-rod t the rearend of which is pivotally secured to the free or outer end of the crank-arm j projecting from the eccentric i, so that the stud s and crank-arm 7' are connected by the linkrod t, whereby the drop-bridge p is linked to the eccentrics The bottom wall a" of the notch or recess a (that is, the upper edge of the notched front end of the basemember a) is flush or even with the top of the front leg f fastened to the base-member a (Fig. 3); and, when the drop-bridge 79 is rocked on its pivots r and the link-rod t is thrown back and forth. this bottom wall a serves to limit the throw of the stud s and thereby the swing of the drop-bridge p and the travel of the link-rod t.

In order to swing the drop-bridge 7). there is provided .a bent operating-arm u the inner end a, 'of which is mounted free to turn in a bearing u formed in the wall or side 72' of the drop-bridge ;0 (Figs. 1 and 2). To

the front end of one of the base-members a, v

scribed.

there is fastened a bar 10 which extends forwardly above the recess a and in the front end of which there is adjustably mounted a stopscrew Upon the inner'end u of the operating arm at, there is fastened a lockingarm y, which engages the stop-screw w, when the operating-arm u is thrown into the position illustrated in Figs. 3 and 1, whereby the drop-bridge p is held locked in the position illustrated in the latter figures.

The operation of the mechanism hereinbefore described will now be readily understood and may be briefly set forth as follows: Let us assume that the machine is in its stationary position (Fig. 2), in which position it rests upon the solid supporting legs or blocks f, g, and that it is desired to render the machine movable upon its wheels m, u. The operator grasps the operating arm a and throws the outer free end of the same upwardly and forwardly, whereby the arm a is brought to the position shown in dotted lines in Fig. 1 and the wall or side 20, which forms the rear wall of the drop-bridge p in Fig. 2,is brought uppermost or into the position of the top wall of the drop-bridge 29. In order now to lock the latter in the position shown in Fig. 1, the workman throws the outer or free end of the arm at laterally downward and brings thisend substantially ,parallel with the top of the drop-bridge 10 (Figs. 3 and 4), during which movement the arm it turns within the bearing a and the locking-arm y is thrown into locking engagement with the stop-screw 00, thereby locking the drop-bridge p in the position illustrated in Fig. 1. In the position illustratedin Fig. 2, the drop-bridge p rests upon its. bottom wall a, which is raised from the floor by the rocking movement just de- The drop-bridge p swings upon the pivots r (Figs. 2 and '3) and the studs 8 are carried through an arc of a circle and move from the rear end to the front end of the recesses a, the upper finished edges a" of the base-members a serving to limit the movement of these studs 8 (Figs. 1 and 2). In their movement fromrear to front, the studs s carry with them the link-rods t, which, in turn, exert a pull 011 the crankarms 9', resulting in a turning of the eccentries 2', whereby the wheels m are lowered and the posts or legs 9 are raised. Furthermore, as the drop-bridge p is swung from its position shown in Fig. 2 to its position illusjtrated in Fig. 1, the steering wheel a is thrown downwardly against the floor and the front ends of the base-members a are raised. By moving the operating arm u in a direction opposite to that just described, the elevatonbase may be lowered so as to rest on the posts 7, g, and the wheels m,*n, raised. Weclaimz 1'. A portable elevator including a base;

legs upon which the same may be supported; a steel'ingwlieel; a steering-wheel carrier pivotally mounted on said base; and an operating-arm which is rotatably mounted on said carrier and free from connection with said base; said operatingarm being aranged to be swung with said carrier to throw the steering-wheel into contact with the floor and then to be turned on said carrier to lock the same in position with the steering-wheel in rolling contact with the floor.

2. A portable elevator including a base; legs upon which the same may be supported; a steering-wheel; other wheels for supporting said. base; means for throwing said otherwh-eels into contact with the floor; a steering-wheel carrier pivotally mounted on said base and operatively connected with said means; and an operating-arm which is rotatably mounted on said carrier and is free from connection with said base; said operating-arm being arranged to be swung with said carrier to throw the steering-wheel and the other wheels into contact with the fioor and then to be turned on said carrier to lock the same in position with the wheels in rolling contact with the floor.

3. A portable elevator including a base; legs upon which the same may be supported; eccentrics rotatably mounted on said base; wheels upon which-said base may be sup ported when said legs are raised from the floor and which are mounted upon said eccentrics; a crosspiece pivotally mounted on said base; means for rotating said eccentrics to raise and lower the wheels mounted thereon, said means being operated by said crosspiece; and an operating-arm by which said crosspiece is swung and said means'are caused to rotate said eccentrics to bring'said wheels into rolling contact with the floor and to raise said legs therefrom.

4:. A portable elevator including a base; legs upon which the same may be supported; eccentrics rotatably mounted on said base; wheels which are mounted upon said eccentrics and uponwhich said base may be supported, when said legs are raised from the floor; a crosspiece pivotally mounted on said base; means for rotating said eccentrics to raise and lower the wheels mounted thereon, said means being operatively connected with said crosspiece; an operating-arm by which said crosspiece is swung and said means are caused to rotate said eccentrics to bring said wheels into rolling contact with the floor and to raise said legs therefrom; and means for lockingsaid crosspiece in position.

5. A portable elevator including a base; legs upon which the same may be supported; eccentrics rotatably mounted upon said base; wheels which are mounted upon said eccentrics and upon which said base may be supported, whensaid legs are raised from the floor; a crosspiece pivotally mounted on said base; means for rotating contact with the floor and raise said legs out of contact therewith; and means for limiting the swing of said crosspiece and the resulting throw of said eccentrics.

6. A portable elevator including a base; legs upon which the same may be supported; eccentrics rotatably mounted upon said base; wheels which are mounted upon said eccentrics and upon which said base may be supported, when said legs are raised from the floor; a crosspiece pivotally mounted on said base; a steering-wheel carried by said crosspiece; means connecting said crosspiece operatively with said eccentrics, whereby said eccentrics are turned by a swinging said crosspiece; and an operating arm by which said crosspiece is swung and said eccentrics are turned to throw said wheels into rolling contact with the floor and to raise said legs out of Contact there with.

7. A portable-elevator base 01": the type having legs and wheels, including a front wheel upon which legs and wheels the base may be alternately supported, characterized in that the front wheel is mounted upon a swinging carrier; the other wheels are mounted to rotate upon eccentrics; and the carrier is operatively connected with the latter and, when swung, throws the front wheel into and out of contact with the floor and turns the eccentrics to lower and raise the other wheels into and out of contact with the floor and support the base alternately upon the wheels and the legs.

8. A portable-elevator base of the type having legs and wheels, including a front wheel, upon which legs and wheels the base may be alternately supported, characterized in that one of the wheels is mounted upon a swinging carrier which is swung by an operating arm; and the latter is mounted in the carrier rotatably and free from connection with the base and may be thrown with the carrier to force the wheel carried thereby into contact with the floor and then turned on the carrier into locking engagement with the base.

Signed at Jersey City, county of Hudson and State of New Jersey, this twenty-second day of June, A. D. 1918, in the presence of the two undersigned witnesses.

WILLIAM E. BOEHGK. H. S. GERMOND, JR. Witnesses:

FLORENCE R. PORTER, BRENTON Boees.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

